I have my own virtual server in the cloud, running nginx and APC. On this server I have one wordpress blog using the W3TC-plugin. I've enabled page cache and object cache using APC.

When accessing front page, pages and posts the response from the server comes almost instantly. But when doing a search, the response takes 1 second.

I'm wondering if it is possible to make the response faster.

Using the Debug Queries WP-plugin I've profiled the search sql query and it only takes 0.002 to complete. And according to W3TC most objects are cached. In fact, the Debug Queries plugin give the following report on a search result:

Response time depends on various factors, starting from application (WordPress), the web server, the caching layer/s (APC, W3TC, etc). If a page is already generated and is in cache, then the response time depends entirely on the web server, the OS, the virtual layer (if any), the network speed, the latency between the request and the server, etc. This question may fit more in ServerFault than here, as there is nothing wrong with WordPress, as you already indicated!
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PothiOct 9 '13 at 7:43

When putting a static .php on the server the response is lightning fast. So it seems as if it is not a php/webserver problem. Or?
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PappAppOct 10 '13 at 8:53